What does CPT modifier -25 indicate in coding a single-day encounter?

• A. A significant, separately identifiable E/M service on the same day.
• B. A minor procedure performed at the same time.
• C. An anesthesia modifier.
• D. A separate procedure performed.

Answer: (A)

Modifier 25 signals a significant, separately identifiable evaluation and management (E/M) service provided on the same day as a procedure or other service. The E/M encounter must be distinct from the procedure, with its own history, exam, and medical decision making that goes beyond the usual pre- or post-procedure care. Documentation should show that the E/M service was substantial and requires independent evaluation, so it can be billed separately from the procedure code. This modifier is not about a minor procedure, anesthesia, or a separate procedure; it specifically flags that the E/M visit itself is a distinct service on the same day.